﻿// Copyright © 2017 Paddy Xu
// 
// This file is part of QuickLook program.
// 
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// 
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// 
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

using System;
using System.Globalization;
using System.Windows;
using System.Windows.Data;

namespace QuickLook.Controls.GlassLayer
{
    public sealed class ElementCoordinateConverter : DependencyObject, IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            var glass = value as GlassLayer;

            if (glass?.BlurredElement == null)
                return null;

            var target = glass.BlurredElement;

            var trans = glass.TransformToVisual(target);
            var p = trans.Transform(new Point(0, 0));

            return new Rect {X = p.X, Y = p.Y, Width = glass.ActualWidth, Height = glass.ActualHeight};
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }
}